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So, I've been having problems with the Genetics Kit. I installed Creatures 2 into C:/GOG Games/Creatures 2. Then I installed the Genetics Kit and attempted to "Lay egg" using the kit. I kept getting a registry error.

I found that reinstalling Creatures 2 into Program Files (x86) solved the issue. After that I could lay eggs using the genetics kit, but you must leave Creatures 2 running. Also, I still get an error when I click "Lay egg" but the egg DOES appear in game.

SOLUTION: If you download Creatures from GOG, click on the options button before install and try changing the directory to something new.
Well, apparently the new directory didn't fix anything.

Installing the Remastered Patch immediately solved the egg laying problem tho.